Ewan McGregor is in final negotiations to play Gotham City mob boss and Batman foe Black Mask in Warner Bros ‘Birds of Prey, individuals with knowledge of the project exclusively tell TheWrap. McGregor joins Jurnee Smollet-Bell and Mary Elizabeth Winstead who have been cast as Black Canary and Huntress. Also, as TheWrap first reported, Rosie Perez is playing Renee Montoya.

Mary Elizabeth Winstead is no stranger to big screen comic book adaptations, having played Ramona Flowers in Edgar Wright’s 2010 cult hit “Scott Pilgrim vs. the World.” She has also portrayed her share of strong female characters in titles including FX series “Fargo” and 2014 biographical crime drama “Kill the Messenger.” Winstead’s new role as Huntress in Warner Bros.’ upcoming female-led “Birds of Prey” is a completely new and different story, though. “I’m going to start training, and I’ll be learning how to shoot a bow and arrow, too — which is new for me,” Winstead told TheWrap during an interview for her latest film, a dramedy called “All About Nina,” in theaters this weekend.

Frances Conroy is in talks to play the Joker’s mother, Penny, in Warner Bros.’ “Joker,” an individual with knowledge of the project exclusively told TheWrap. Joaquin Phoenix is set to play the titular character, while “Deadpool 2” star Zazie Beetz is in talks to join the cast as a single mother who catches the attention of the Joker prior to his transformation into the nihilistic Gotham City villain. In Alan Moore’s version of the Joker’s origins, the villain was an unnamed failed comedian who struggles to make ends meet for his pregnant wife.